hi all here's one to get your heads round im putting my stage 3 turbo upgrade to my e30 318is but i have been told that the gearbox and diff may not handle it.As it will be running about 270bhp.
does anyone no of any other models of e30 that will fit on mine such as 325i or 325is as i honestly aint got a clue if there is anyone out there who could help that would be great.
dubzy1981@hotmail.com
HELP HELP gearbox and diff problems on turbo is
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Pal318is
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Can't help to much with the answers you need...Apologies, but your conversion does sound good....Keep a log in the Engine Swp section of the zone...
Pal
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Gwynleym10
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Sounds like a good project, you'll have to post specs up!
If you have a large case diff, I suspect you'll need at least an m3 one for gearing you will be fine.
As for the gearbox, I'm pretty sure nothing else will fit. But i might be fine, with regular fluid changes!
Would have thought the clutch would need uprating though
If you have a large case diff, I suspect you'll need at least an m3 one for gearing you will be fine.
As for the gearbox, I'm pretty sure nothing else will fit. But i might be fine, with regular fluid changes!
Would have thought the clutch would need uprating though
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e30_Turbo
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M3 diff will be fine as thats what the Swedes use on there silly power conversons and I'll be joining them soon. 
Gearbox's I'm not sure about, hmmmm, this is a question for the real guru's of e30 land!
Glad to see another turbo tho!
HTH, Mark.
Gearbox's I'm not sure about, hmmmm, this is a question for the real guru's of e30 land!
Glad to see another turbo tho!
HTH, Mark.
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Andy335Touring
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fozzymonster wrote:M3 diff will be fine as thats what the Swedes use on there silly power conversons and I'll be joining them soon.
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Paulsimon8
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M3 diff will be fine for use. I'll be putting 350 horses thru mine very shortly
If you can get hold of one, the larger diff cover with the massive cooling fins - your diff will love you for it
One of these badboys
If you can get hold of one, the larger diff cover with the massive cooling fins - your diff will love you for it
One of these badboys
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Simon13
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thats a ZM3/coupe back plate cover £100 from the dealer with the stonger rear bush in it also
as it's a 4 pot i can't think of a gearbox which will bolt straight on, as the 2.5 boxes can handle the power your car will be running
M3 diff is all ok but the ratio will be well out if you can't use a gearbox like the dogleg unit no?
as it's a 4 pot i can't think of a gearbox which will bolt straight on, as the 2.5 boxes can handle the power your car will be running
M3 diff is all ok but the ratio will be well out if you can't use a gearbox like the dogleg unit no?
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Nelly
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Even a 3.64 LSD should be fine in it as for the g/b, if you wanted to go down the route of an adaptor for the bell housing and use some thing along the lines of a cosworth g/b - not heard of it done before with the IS engine but, with the old sckool v6/v8 conversions this was a good/strong mod.
Only thing is you'll be shelling out to get the prop shaft shortened and balanced to allow for a different g/box
Neil.
Only thing is you'll be shelling out to get the prop shaft shortened and balanced to allow for a different g/box
Neil.
"I F**KING LOVE YOU GUMBO"
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Motorhole
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Its torque that kills diffs and gearbox, not power (As such...).
M3 diff is great, wassisname with the LS1 engined M3 (411bhp and nearly 400lbft torque) uses one.
Once more, not sure about boxes...though looking in the owner's manual, all the boxes are the same ratio apart from the sport box fitted to the 325is and 318is (is that right?) which insinuates that they are the same 'box?
M3 diff is great, wassisname with the LS1 engined M3 (411bhp and nearly 400lbft torque) uses one.
Once more, not sure about boxes...though looking in the owner's manual, all the boxes are the same ratio apart from the sport box fitted to the 325is and 318is (is that right?) which insinuates that they are the same 'box?